Cast hidl_pointer<T> to void*.

hidl_pointer<T> can only allow one implicit conversion
operator, and native_handle_t* is the one that makes
most sense. Hence, this requires an explicit cast.

Bug: 32089785
Test: builds
Change-Id: Ie952ee2e4f0c20fa33f793403d51f3d550257310
diff --git a/tests/bar/1.0/default/Bar.cpp b/tests/bar/1.0/default/Bar.cpp
index 4ff9e6b..2158cd8 100644
--- a/tests/bar/1.0/default/Bar.cpp
+++ b/tests/bar/1.0/default/Bar.cpp
@@ -154,7 +154,7 @@
 }
 
 Return<void> Bar::expectNullHandle(const native_handle_t* h, const Abc& xyz, expectNullHandle_cb _hidl_cb) {
-    ALOGI("SERVER(Bar) h = %p, xyz.z = %p", h, xyz.z);
+    ALOGI("SERVER(Bar) h = %p, xyz.z = %p", h, static_cast<void*>(xyz.z));
     _hidl_cb(h == nullptr, xyz.z == nullptr);
     return Void();
 }